123131144 has 64 divisors (see below), whose sum is σ = 249350400. Its totient is φ = 56871936.

The previous prime is 123131143. The next prime is 123131147. The reversal of 123131144 is 441131321.

It is a super-2 number, since 2×123131144² = 30322557245497472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123131143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195397 + ... + 1195499.

It is an arithmetic number, because the mean of its divisors is an integer number (3896100).

Almost surely, 2^123131144 is an apocalyptic number.

It is an amenable number.

123131144 is an abundant number, since it is smaller than the sum of its proper divisors (126219256).

123131144 is a wasteful number, since it uses less digits than its factorization.

123131144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 123131144 is about 11096.4473594029. The cubic root of 123131144 is about 497.4956696003.

Adding to 123131144 its reverse (441131321), we get a palindrome (564262465).

The spelling of 123131144 in words is "one hundred twenty-three million, one hundred thirty-one thousand, one hundred forty-four".